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HomeMaterials Science ForumMaterials Science Forum Vol. 712The Influence of Carbon Doping on TiO2...

The Influence of Carbon Doping on TiO₂Nanoparticle Size, Surface Area, Anatase to Rutile Phase Transformation and Photocatalytic Activity

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Abstract:

Visible light-sensitive carbon doped titanium dioxide nanoparticles (C-TiO₂) were prepared by a sol-gel method. The carbon dopant was obtained from glucose. The dopant level incorporated into the TiO₂ lattice structure was varied by using different concentrations of the carbon source solution. The nanoparticles were characterized by X-ray diffraction (XRD), BET Surface area, Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Scanning X-ray photoelectron spectroscopy (SXPS) and Diffuse reflectance spectroscopy (DRS). The presence of carbon in the TiO₂ lattice was determined by SXPS. The DRS results revealed that carbon doping reduced the band gap of TiO₂. Doping was also found to cause a reduction in the particle size of the TiO₂nanoparticles and enhance anatase to rutile phase transformation. The photocatalytic activities of the prepared samples were evaluated by the photocatalytic degradation of methyl orange. The carbon doped TiO₂showed a higher photocatalytic activity than degussa P25 and undoped TiO₂.

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Periodical:

Materials Science Forum (Volume 712)

Pages:

49-63

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.712.49

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Online since:

February 2012

Authors:

P. Nyamukamba, Lilian Tichagwa, C. Greyling

Keywords:

Anatase, Carbon Doping, Nanoparticle, Particle Size, Photocatalytic Activity, Rutile, TiO₂, UV-VIS

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